Although Koreatown is somewhat of a misnomer: it got its name from the predominance of Korean-owned businesses on Olympic and Eighth Street, rather than from a concentration of Korean immigrants and Korean-Americans. The area as a whole is majority Latinx; we lived in the mostly black and white part of Koreatown (9th and Hobart) in the 70s and the white/Latino/South Asian part (9th and Catalina) in the 80s.

Spanish is obvious to everyone. Chinese is a logical guess considering their world population. Filipinos make sense by sheer observation of living in LA. Koreans and Armenia have the largest municipal concentration here outside their respective countries. Given the number of Vietnamese and Persian food restaurants, they make sense. Japanese have a historical presence albeit small. Russians and Arabs are good guesses based on world population.

All of the European countries are MUCH farther away from LA than the Asian countries. Generally speaking, the East Coast gets more European immigrants and the West Coast gets more Asian immigrants, simply because they're what's closest.

At my son's elementary school in sort of central LA he had classmates who spoke Spanish, Russian, Arabic, Chinese, Korean, and Burmese. I am probably leaving out a few others. (His Russian-speaking classmate sounded like Natasha Badenov in kindergarten and like Moon Unit Zappa by 5th grade.)